Stereoscopic Vision Differences

Humans have stereoscopic vision, each eye sees an identical, but slightly different image of the same scene. This difference is pointed to as retinal or binocular disparity. These two images are processed by the brain in a way that allows the human to slightly see around an obstacle without having to physically move and uses it to retrieve a description of the 3-D structure of the scene. Like human eyes, stereo vision, infers the distance from two images taken from different views. It is based upon the fact that the same object would seem at slightly different locations in the left and right eye of a human, which is known as a disparity. Binocular stereo vision uses a pair of frontal parallel cameras to deduce the distance by calculating